639123844

素因数分解:

$2^2\times {\mathrm{2221}}^1\times {\mathrm{71941}}^1$

素因数の和:74166

約数の個数: 12

約数和(自身を含む): 1118985868

約数和(自身を除く): 479862024

約数列:

[1, 2, 4, 2221, 4442, 8884, 71941, 143882, 287764, 159780961, 319561922, 639123844]

約数ペア:

[(1, 639123844), (2, 319561922), (4, 159780961), (2221, 287764), (4442, 143882), (8884, 71941)]